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【单选题】
以下氢致脆化中属于最常见的氢脆的是:A.
白点
B.
氢蚀
C.
氢化物致脆
D.
氢致延至断裂
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】— May I swim in the river, Mum? — . [ ]
A.
No, you aren't
B.
Why do you ask me
C.
No, you can't
D.
I can't go with you
【单选题】—Bad luck. My computer doesn’t work. —Why not turn to John? No one can match him in our class when it __________repairing computers.
A.
comes to
B.
leads to
C.
contributes to
D.
attends to
【单选题】听力原文：Why can't the man ask John to call him back? (15)
A.
Because he hasn't a phone.
B.
Because he's leaving the city right now.
C.
Because he's calling from a friend's.
D.
Because his wife is terribly sick.
【单选题】Why can't John Rivers accept Miss Oliver's love?
A.
He had promised to be a missionary.
B.
Because his sisters didn't like her.
C.
Because he had promised to be single.
D.
Because Oliver's father had opposed to their marriage.
【单选题】Why can't John go on the boat trip?(T4)
A.
He has booked theatre tickets.
B.
He's scared of the water.
C.
He doesn't feel well.
D.
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